１．https://mobaxterm.mobatek.net/ 無料ダウンロード
２．ssh ユーザ@IP
下記エラーあった場合、３へ
/usr/bin/xauth: file /home/oracle/.Xauthority does not exist
３．ssh-keygen
$ ssh-keygen
Generating public/private rsa key pair.
Enter file in which to save the key (/home/oracle/.ssh/id_rsa): /home/oracle/.ssh/id_rsa already exists.
Overwrite (y/n)?y
４．再ログイン
$ ログアウト
$ ssh oracle@192.168.123.100
$ startx
xauth: file /home/oracle/.serverauth.75966 does not exist
/usr/libexec/Xorg.wrap: Only console users are allowed to run the X server
xinit: giving up
xinit: unable to connect to X server: Connection refused
xinit: unexpected signal 2
Couldn't get a file descriptor referring to the console
５．$ $ORACLE_HOME/bin/
$ ./dbca
６．文字化け場合
$ export LANG=c
$ ./dbca でOK
